Overview
Trezor Suite® is a comprehensive user-facing application that pairs with Trezor hardware wallets to deliver secure key management and transaction signing. This developer portal add-on condenses the practical steps you need to integrate Trezor capabilities into web and server applications, from environment preparation to live deployment considerations. It focuses on three pillars: security-first architecture, predictable UX for signing flows, and robust testing.
Setup & prerequisites
Begin by installing Trezor Suite desktop or Bridge for browser access. For web integrations, install and pin the Trezor Connect library to a tested version. Confirm your Node.js and browser targets match the SDK compatibility matrix. Use dedicated test devices (or emulators) seeded with test-only mnemonics and segregate your test and production credentials — this prevents accidental use of production seeds during development.
Typical integration flow
The minimal integration flow is: discover and pair device → request public keys for address derivation → construct unsigned transaction payloads on backend → send unsigned payloads to device for user approval → receive signatures → assemble and broadcast the final transaction. Implement UI flows that make device prompts and amounts explicit — users should always be able to confirm the recipient, chain, and amount on both app and device screens.
SDKs and recommended libraries
Use the official Trezor Connect JavaScript SDK for browser-based integrations. For server or tooling tasks, community SDKs and examples (Python, Go) can help with PSBT construction, EIP-1559 handling for Ethereum, and chain-specific serialization. Prefer high-quality, community-reviewed libraries to re-implementing low-level transport code such as WebUSB or WebHID unless you have a specific, well-justified need.
Security practices
Design assuming compromise of your application server. Never export device private keys; only request signatures and public keys from the device. Implement rate limiting for signing requests, require multi-step approvals for high-value transactions, and maintain tamper-evident logs of signing activities. Use HSMs for backend policy enforcement where necessary and store only non-sensitive metadata in logs.
Testing strategy
Automated tests must cover transaction builders, address derivation, and failure modes. Run unit tests for construction logic and automated integration tests against public testnets. For critical flows, include hardware-in-the-loop testing in CI pipelines guarded by flag to prevent accidental mainnet use. Create reproducible device snapshots (seeded test devices) for regression testing across firmware versions.
User experience & accessibility
Provide clear onboarding: show how to install Bridge or enable WebHID, how to pair a device, and how to interpret on-device prompts. Ensure keyboard navigation and screen-reader accessible transcripts of on-device confirmations so that users with impairments can verify signing details. Error messages should be actionable — e.g., “Device disconnected — try re-plugging and checking Bridge permissions.”
Performance & operational guidance
Batch read-only requests like public-key retrieval and cache verified public keys to reduce user friction. Keep signing user-initiated and rate-limited. For high-throughput services, adopt a hybrid custody model: hot wallets for micro transactions and Trezor-protected cold storage for high-value holdings. Monitor device disconnect rates, signing latency, and firmware mismatch metrics as part of SRE dashboards.
Firmware and compatibility
Keep a compatibility matrix linking SDK versions to supported firmware builds. Firmware updates may add features or deprecate older behaviors — test integrations against new firmware in staging before prompting users to update in production. Communicate clearly when a firmware update is required to complete an integration flow.
Monitoring, logging & incident response
Instrument signing endpoints with privacy-respecting telemetry: collect counts of failures, reasons (user reject, device timeout, malformed payload), and device firmware versions. Maintain runbooks for common device issues and provide sanitized logs for support that do not leak secrets. For suspected compromises, have an escalation path that includes key rotation policies and user communication templates.
Open source contribution and community
Contribute bug reports, reproducible examples, and documentation updates to the relevant GitHub projects. Participate in community forums to share integration patterns and learn from common pitfalls. Reusing and improving community-reviewed code reduces risk and accelerates development.
Getting to production
Before launch, lock down your compatibility matrix, complete audits for signing flows, add CI hardware tests, and prepare support runbooks. Stage rollouts to a subset of users and monitor for anomalous signing behavior. Provide clear recovery guidance for users who lose devices and ensure that support can validate device model and firmware during triage without accessing secrets.
Quick code example (high level)
// High-level JS using Trezor Connect (simplified)
import TrezorConnect from 'trezor-connect';
await TrezorConnect.init({ manifest: { email: 'dev@example.com', appUrl: 'https://example.com' }});
const pub = await TrezorConnect.getPublicKey({ path: "m/84'/0'/0'/0/0" });
// Build unsigned tx on backend, return psbt
const signed = await TrezorConnect.signTransaction({ /* psbt payload */ });
// Combine & broadcast